[Michele]

Hi pix,
T200 which to Kassem refers supervises Ack on the LapDm (layer 2 protocol on the Um interface (MS-BTS)).
In this case BSC and core network are unaware of that and need to be advised by Error Indication message (from BTS to BSC) in such a way to release the call.

In case of T200 expiry on Abis interface, BSC is already informed and no ERRIND is necessary.

[Pix]

Thanks michelle, I finally found this parameter in our dictionnary 🙂 there is a T200 for LapD management, and others T200 for LapDm management.

Supervision of acknowledgements for SDCCH SAPI 0. = 220ms
Supervision of acknowledgements for SDCCH SAPI 3. = 450ms
Supervision of acknowledgements on RSL for OMU SW. = 1sec
and so on ….

[pradhan. orissa]

tons f thanks 4 providing such valuable info

[kassem]

Thank you so much pix/Michele

[Pix]

Since we’re all there : thank you one more time michelle 🙂

[Zia]

In one case i am facing Handover failure, could any one tell me what is the best value for T200/ N200 to avoid Handover failure and call drops?

[vijay]

what is the meaning of SABM command, multiple frame established state? when this would come

[Faiq Ahmadin]

Dear All,

anyone know how to set/change parameter BR9.0 MNTBMASK BIT30 & BIT31 to 0 ?

Thanks
Faiq

[sergio.balut]

T200 expired problem

[sergio.balut]

TCH droprate problem

[ali]

Why TCH blocking occurs?

[Anshu]

Hardware issue,
Lesser Trx
Wrong half rate setting
DRT Disabled
Locked Ts or Trx

[wajahat]

Can anyone please guide that in which message inside Drive Test (done using TEMS) I can see T200 timer value?
As with other parameters that are available in Layer 3 Messages (System informations and Assignment commands) how can I find currently set value of T200 from Drive Test.

[pix]

hi,

you might find it in the LAYER-2 messages, not in the LAYER-3. Now, in which msg exactly, i don’t.

regards
pix

[Adel]

Dear All,
Kindly support for the causes of call drop due to Release indication.

Thanks

[Author]

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